Corinna comes from the name
Korinna, which all similar names stem from (
Corrina,
Corinne, etc.). It is prounounced Cor-EE-nah, and I prefer this spelling because it is closest to the original (which I would prefer to use, but don't like the K).
We'd pronounce it Heh-LAY-nah. I'm not that worried about them looking similar. Plus, we wouldn't call them their full names all that often; we tend to use nicknames. I kind of wanted to know if they were too similar, but I'm thinking now that it doesn't really matter to me... it's not as though they'll always be a sibset after all. But thanks for the input!